Call-recording system.



A. E. LUNDELL.

CALL RECORDING SYSTEM.

APPLlCATlON FILED Aue.22. 1916.

Patented Nov. 13, 1917.

lnvemor: Aiken E. Luna'e/l.

A. E. LUNDELL. CALL RECORDING SYSTEM. APPLICATION FILED AUG.22| 1916.

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ALBEN E. LUNDEIIL, OF NEW YORK, N. Z, i if. N. Y., A; C0 51:1 OBATION mconroaa'rnn, or new or new rear rece es.

Specification of Letters fiaten Patented Nov. 13, 1917.

Application filed August 22, 1916. Serial 1W0. 116,250.

To all whom it may concern:

Be it known that I, ALBEN E. Luxnm,

a citizen of the United States, residing at New York. in the county of Bronx and State of New York, have invented certain new and useful Improvements in Call-Recording Sysif actuated by the closure of the initial com return key. will cause such a number of 1mpulses to be sent to the switch which establishes connection to the recording operator that this switch will hunt in a group of trunks whose signals will inform the recording operator that the calling subscriber is of the coin box class. If the coin return key is not actuated, the switch will hunt in' a group of trunks whose signals at'the recordmg operators position will inform the recording operator that the calling subscriber is not of the coin box class.

It is thought that the invention will be best understood from the following detailed description, reference being had to the accompanying drawings. I

In the drawings, Figure 1 illustrates diagrammatically apparatus and a circuit arrangement for carrying out the invention; Fig. 2, which is to be placed below Fig. 1, shows portions of an operators sender circuits equipped to embody certain features of the invention.

The substation indicated at 41 is equipped with a coin collecting device indicated at 42,

the cap of the associated line signal 43 having distinctive marking common to the substations equipped with coin collecting devices. The substation indicated at 4 is not equipped with a coin collecting device, and the associated line signal 5 is equipped with being understood that these conventions are merely assumed to give clearness to the present description. A connecting operatorscord circuit is indicated at 0, while the position of the recording operator is indicated at O, the same conventions bein ators position as at the connecting operators position. f v

A call from a s bscriber of the coin box class will first be traced. Y

When the subscriber at substation 41 removes his receiver from the hook, his line signal 43-,is displayed in the well-knownv manner. The operator at O on observing the hghtmg of line si al 43 inserts a plugfi into a 1ack 7, assoclated with line signal 43,

whereupon the subscribers cut-oft relay 8 is energized over a circuit from grounded battery, windin of cut-oflz' relay 8, sleeve contact of jack sleeve of plug 6, winding of relay 9, to ground. Upon the insertion.

of plug 6 m ack 7 a circuit is completed for thepower magnet 100 of the connecting cord sequence switch from ground, front contact of relay 9, sequence switch contact 101', winding of power magnet 100, to

grounded battery. The sequence switch then moves from position 1 into position 2 under the control of its normal contact 102.

assumed at the recording oper- The connecting operator then depresseslistening key K to connect her head set to the line of the calling subscriber. Upon learning that a long dlstance connection s desired she depresses coin reflmd key K.

In position 2 of the sequence swltch, circuit is completed from grounded battery, relay 11, upper contact of key K, tip of plug 6 tip contact of jack 7 upper side of the su scribers line, polarized magnet of the .coin collecting device 42, to ground. This operates the coin collecting device to return the deposited coin to the calling subscriber. At the same time a circuit is'comconnecting cords by means of a cord finder switch which for the sake of brevity has been omitted. It will be assumed that the sender is in association with the connecting cord shown in the drawing.

9c pleted from grounded battery, lower left- In position 2 of the connecting cord sequence switch a circuit is completed for the power magnet 200 of the sender sequence switch, from grounded battery, power magnet 200, contact 201, connecting cord sequence switch contact 104, to-ground. Sequence switch 200 moves from its first to its second position under the control of its normal Contact 202. Relay 14 is locked up from the second to the fifteenth position of the sender sequence switch over a circuit from A circuit, generally known asthe funda-.

mental circuit, is now completed for relay 15 from grounded battery, winding of relay 15, connecting cord sequence switch contact 105, sender sequence switch contact 205, left-hand armature and back contact of relay 0', winding of-stepping relay 17 to ground at connecting cord sequence switch contact 106. Relay 15 at its righthand armature and front contact completes a circuit for moving the connecting cord sequence switch out of position 2 and into position 3,

from grounded battery, winding of power magnet 100, connecting cord sequence switch contact 107, to ground at the armature and front contact of relay 15. In the third position of the connecting cord sequence switch, relay 15 locks itself up over the fundamental circuit from grounded battery, winding of relay 15, connecting cord sequence switch contact 108, left-hand armature and front contact of relay 15, to ground over the path previously described. At the same time a circuit is completed for up-drive power magnet 18 from grounded battery, winding of power magnet 18, connecting cord sequence switch contact 109, to ground at the right-hand armature and front contact of relay 15. The brush set 19 is moved upward by the action of constantly rotating roller 20, a brush 21 at the same time being moved over a commutator 22. Since the relays 17 and 14 are energized at this time, a circuit will be completed from ground, armature and front contact of relay 17, sender sequence switch contact 206, righthand contact of key K, right-hand armature and front contact of relay 14, armature and back contact of the upper counting relay 2', winding of lower counting relay 2, to grounded battery. The action of brush 21 intermittently shunts out relay 17 over a path from connecting cord sequence switch contact 110, conducting segment 22 and brush 21 to ground, to successively operate the counting relays in the well-known manner, it being understood that brush 21 engages a conducting brush of commutator 22 at the completion of each group step of brush set 19. lVhen the upper counting relay 1' is energized, a circuit for lower counting relay O is completed from grounded battery, winding of relay 0, armature and front contact of upper counting relay 1, armature and front contact of upper counting relay 2, to ground at the armature and front contact of stepping relay 17 over the path previously described. When stepping relay 17 is again shunted out, upper counting relay 0' is energized in a locking circuit of lower counting relay 0 from grounded battery, winding of relays O and O, armature and front contact of relay 0, to ground at sender sequence switch contact 207. Relay 0 at its left-hand armature permanently opens the fundamental circuit, and at its right-hand armature completes a circuit from ground, sender sequence switch contact 208, winding of power magnet 200, to move the sender sequence switch out of position 4. When brush 21 again engages an insulated portion of the commutator, relay 15 is denergized, closing at its righthand armature and back contact a circuit from ground, connecting cord sequence switch contact 111, winding of power magnet 100, to grounded battery, for moving the connecting cord sequence switch out of position 3 and into position 11. When the connecting cord sequence switch moves out of position 3, the circuit of up-drive magnet 18 is opened and the brush set 19 comes to rest.

The brush set 19 is now positioned in operative relation to a group of trunks leading to a recording operators position at O, the line signals 24 of such trunks having distinctive markings on their caps to indicate tothe operator at O that the call is from a substation equipped with a coin collecting device. Trunk hunting in this group takes place in the Well-known manner in some position of the connecting cord sequence switch between positions 3 and 11.

When the sender sequence switch arrives in position 16, a circuit is completed from ground, sender sequence switch contact 209, connecting cord sequence switch contact 112, winding of power magnet 100, to grounded battery, for moving the connecting cord sequence switch from position 11 into position 16, which is the talking position.

When the brush set 19 arrived on the ter minals of an idle trunk, a circuit was completed for a trunk relay 25 from grounded battery, winding of relay. 25, trunk conductor 26, terminals 27, brush 28, connecting cord sequence switch contact-113, upper right-hand winding of repeatmg coil 12, to

ground. Relay 25 attracts its armature and causes the display of trunk signal 24.. The operator at the counting relays will now extend through .whose hne lamps have plain caps so a back contact relay 14 and only one impulse will be sent instead of the two which were seht .before. The brush set 19 will now be positioned below the group of truiilks t at theoperator'at O is informed that the line desiring a long distance connection is not of the coin box type.

At the concluslon of the conversation the operator at O is informed by the lighting of supervisory signalscontrolled by supervisory relays 13 and 31 that connection is no longer desired. She then removes plug 6 from jack 7, this operation resulting in the deenergization of relay 9. Relay 9 at its back contact completes a circuit from ground, connecting cord sequence. switch contact 114, winding of power magnet 100,

to grounded battery. The connecting cord sequence switch is moved from position 13 to position 18. In position 18 a circuit is completed for down-drive magnet 32 from grounded battery, winding of magnet 32, connecting cord sequence switch contact 115,

- to ground. The brush set 19 is then re- 1 longing to subscribers of various classes of turned to its normal position. When brush 21 engages a segment 33 a circuit is completed from grounded battery, winding of power magnet 100, connecting cord sequence switch contact 116, segment 33 and brush 21, to ground. The connecting cord sequence switch is now moved from position 18 to position 1. On leaving position 18 the circuit of down-drive magnet 32 is opened, and the brush set comes to rest in its normal position.

What is claimed is:

1. In a telephone exchange system, a connecting' operators position, lines mcoming to said operators position. said lines be service, line signals associated with said incoming lines, said line signals having characteristic markings to inform said connecting operator of the class of service to which the line belongs, a second operators position, lines outgoing from said connecting operators position to said second operators position, signals associated with said last- O' inserts a plug 29 into a jack- 30 associatedwith signal 24 and learning mentioned lines at said second operators position, said signals having characteristic markings to inform said second operator of the class of service of the line originating the call, and means for automatically associating incoming lines of a given class oiservice with outgoing lines whose signal is simi- 2. In a telephone exchange system, incoming lines, coin collecting devices associated with certain of said incoming lines, a connecting operators position, a coin return key thereat, a recording operators position, means for establishing a connectlon to said recording operators position, and automatic means controlled by said coin return key for informing'said recording operator whether or not the line calling is equipped with a coin collecting devlce.

3. In a telephone exchange stem, incoming lines, coin collecting devices associated with certain of said incoming lines, a

connecting operators position, a coin re-* turn key thereat, a relay controlled by said coin return key, a recording operators position, means for establishing a connection to said recording. operators position, and

- means, including said coin return key and coming lines, coin collecting devices associated with certain ones of said incoming lines, outgoing lines arranged in groups, a connecting operators position, automatic switches under the control of said connecting operator for interconnecting said lines,

a recording operators position to which certain groups of said outgoing lines lead, signals associated with said lines at said recording operatorsposition, said signals having characteristic markings individual to their group, and means for causing one of said switches to hunt in one or another of such groups in accordance with whether or not the line calling is equipped with a coin collecting device.

5. In a semi-automatic telephone system,

a connecting operators position including connecting cord clrcults, a manually operable key individual to each of said cord circuits, a sender arranged for association with said cord circuits, and a relay associated with said sender and arranged to be controlled by one ofsaid keys, said felay when actuated causing said sender to transmit a certain number of impulses and. when not actuated causing a different number of impulses to be transmitted.

6. In a telephone exchange system, a plu-- rality of operators positions, lines arranged for servlce of difierent-clas'ses-incoming to vone o erators osition si als characteristie of the classes of lines at both positions,

trunks for connecting a calling line with a.

J second position, and means for displaying at both posit-ions signals oeculiar to t e class of line connected therewith.

7. In a telephone exchange system, a 0111- rality of operators positions, lines arranged for service of difl'erent classes incoming to one operators position, means for connecting said position to a second position, appa- 0 ratus peculiar to the lines of one class, a

contact device at the first operators osition for governing said apparatus, signa s at the second operators position characteristic of the difi'erent classes of lines, and means whereby the contact device controls signals of one character.

In witness whereof, I hereunto subscribe my name this 21st day of August A. D.,

ALBEN 'E. LUNDELL. 

